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[Isiah Meadows <impinball@xxxxxxxxx>]

That was my hypothesis. I know little about the internals of ALSA.]

It has lately started happening less often for me, but I haven't made a
concerted attempt recently to see if it still repros on my machine.

I apparently haven't posted repro instructions yet, so here they are
(only works on laptops)

1. Boot and log in.
2. Put machine into sleep mode.
3. Wake the machine.
4. As it's waking (and the screen comes on), put it to sleep while it is loading. This means closing the lid in the case for laptops.
5. Wake the machine again. 
6. Sound now stops working through speakers.
7. Put the machine to sleep.
8. Wake it again, and unlock it if necessary.
9. Sound now works through speakers.

Note: this works about 30-50% of the time, but it is rare for it to take
more than 3-5 tries to trigger it. The typical case I've found is 2.

I also have libtiff4 installed,  but I don't have the easiest access to
a clean install.

-- 
You received this bug notification because you are a member of Ubuntu
Touch seeded packages, which is subscribed to alsa-driver in Ubuntu.
https://bugs.launchpad.net/bugs/1320020

Title:
  [Inspiron 1470, Realtek ALC272, Speaker, Internal] No sound at all

Status in “alsa-driver” package in Ubuntu:
  Confirmed

Bug description:
  I can get perfect sound through headphones, and the kernel recognizes
  the internal speaker, but nothing is ever played through it. I have
  personally tested a pair of earbuds to make sure that sound could play
  through the headphone port, and that isn't a problem. The sound driver
  just refuses to recognize the existence of the speaker, even though
  the kernel does.

  I wouldn't be surprised if the last upstream update had something to
  do with it.

  ProblemType: Bug
  DistroRelease: Ubuntu 14.04
  Package: alsa-base 1.0.25+dfsg-0ubuntu4
  ProcVersionSignature: Ubuntu 3.13.0-24.47-generic 3.13.9
  Uname: Linux 3.13.0-24-generic x86_64
  NonfreeKernelModules: wl
  ApportVersion: 2.14.1-0ubuntu3.1
  Architecture: amd64
  AudioDevicesInUse:
   USER        PID ACCESS COMMAND
   /dev/snd/controlC0:  isiah      7361 F.... pulseaudio
  CurrentDesktop: GNOME
  Date: Thu May 15 18:07:52 2014
  InstallationDate: Installed on 2014-01-29 (106 days ago)
  InstallationMedia: Ubuntu-GNOME 13.10 "Saucy Salamander" - Release amd64 (20131017)
  PackageArchitecture: all
  SourcePackage: alsa-driver
  Symptom: audio
  Symptom_AlsaPlaybackTest: ALSA playback test through plughw:Intel failed
  Symptom_Card: Built-in Audio - HDA Intel
  Symptom_DevicesInUse:
   USER        PID ACCESS COMMAND
   /dev/snd/controlC0:  isiah      7361 F.... pulseaudio
  Symptom_Jack: Speaker, Internal
  Symptom_Type: No sound at all
  Title: [Inspiron 1470, Realtek ALC272, Speaker, Internal] No sound at all
  UpgradeStatus: Upgraded to trusty on 2014-05-04 (11 days ago)
  dmi.bios.date: 03/23/2011
  dmi.bios.vendor: Dell Inc.
  dmi.bios.version: A05
  dmi.board.name: 0M7CYJ
  dmi.board.vendor: Dell Inc.
  dmi.board.version: A05
  dmi.chassis.type: 8
  dmi.chassis.vendor: Dell Inc.
  dmi.chassis.version: A05
  dmi.modalias: dmi:bvnDellInc.:bvrA05:bd03/23/2011:svnDellInc.:pnInspiron1470:pvrA05123:rvnDellInc.:rn0M7CYJ:rvrA05:cvnDellInc.:ct8:cvrA05:
  dmi.product.name: Inspiron 1470
  dmi.product.version: A05123
  dmi.sys.vendor: Dell Inc.

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